1. Lesson 4­4.notebook
Assignment:
1­­>L4.4, pg. 240­241, #2­36 (evens) ­ Due Tomorrow (10/15)
2­­>Checkpoint 4.3­4.4 ­ Due Thursday (10/16)
3­­>Chapter 4 Test ­ Friday (10/18)
4­­>Test signed??
October 15, 2013

2. Lesson 4­4.notebook
Lesson 4.4 WarmUp:
Write an equation in point­slope form for the line that
passes through each point with the given slope.
1) (5, 3), m = 7
Write each equation in standard form.
2) y ­ 10 = 2(x ­ 8)
3)
2y + 3 = ­1/3(x ­ 2)
Write each equation in slope­intercept form.
4) y ­ 11 = 3(x + 4)
5)
y + 4 = 3(3x + 3)
October 15, 2013

3. Lesson 4­4.notebook
October 15, 2013
Lesson 4.4:
*parallel lines ­ lines in the same plane that never intersect
...and have the same slope
*perpendicular lines ­ lines in the same plane that intersect at right angles
...and have slopes that are "opposite reciprocals"
ie ­­>
3/4 and ­4/3
...and the product of their slopes = ­1

4. Lesson 4­4.notebook
October 15, 2013
Lesson 4.4 examples:
Write an equation in slope­intercept form for the line that passes through the given
point and is PARALLEL to the graph of the given equation.
A) (­1, 2), y = 1/2x ­ 3
B)
(3, ­2), y = x + 4

5. Lesson 4­4.notebook
Write an equation in slope­intercept form for the line that passes through the
given point and is PERPENDICULAR to the graph of the given equation.
C) (­1, 4), y = 3x + 5
D)
(­3, ­2), y = ­2x + 4
October 15, 2013

6. Lesson 4­4.notebook
Determine whether the graphs of the following equations are parallel,
perpendicular, or neither.
E) y = ­2x ­and­ 2x + y = 3
F)
3x + 5y = 10 ­and­ 5x ­ 3y = ­6
October 15, 2013